/* Copyright (c) 2010, Carl Burch. License information is located in the
 * com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */

package com.cburch.logisim.gui.opts;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import com.cburch.logisim.file.ToolbarData;
import com.cburch.logisim.gui.generic.ProjectExplorer;
import com.cburch.logisim.gui.generic.ProjectExplorerEvent;
import com.cburch.logisim.gui.generic.ProjectExplorerListener;
import com.cburch.logisim.gui.generic.ProjectExplorerToolNode;
import com.cburch.logisim.tools.AddTool;
import com.cburch.logisim.tools.Tool;
import com.cburch.logisim.util.TableLayout;
import static com.cburch.logisim.util.LocaleString.*;

@SuppressWarnings("serial")
class ToolbarOptions extends OptionsPanel {
    private class Listener
            implements ProjectExplorerListener, ActionListener, ListSelectionListener {
        @Override
        public void selectionChanged(ProjectExplorerEvent event) {
            computeEnabled();
        }

        @Override
        public void doubleClicked(ProjectExplorerEvent event) {
            Object target = event.getTarget();
            if (target instanceof ProjectExplorerToolNode) {
                Tool tool = ((ProjectExplorerToolNode) target).getValue();
                doAddTool(tool);
            }
        }

        @Override
        public void moveRequested(ProjectExplorerEvent event, AddTool dragged, AddTool target) { }
        @Override
        public void deleteRequested(ProjectExplorerEvent event) { }
        @Override
        public JPopupMenu menuRequested(ProjectExplorerEvent event) { return null; }

        @Override
        public void actionPerformed(ActionEvent event) {
            Object src = event.getSource();
            if (src == addTool) {
                doAddTool(explorer.getSelectedTool().cloneTool());
            } else if (src == addSeparator) {
                getOptions().getToolbarData().addSeparator();
            } else if (src == moveUp) {
                doMove(-1);
            } else if (src == moveDown) {
                doMove(1);
            } else if (src == remove) {
                int index = list.getSelectedIndex();
                if (index >= 0) {
                    getProject().doAction(ToolbarActions.removeTool(getOptions().getToolbarData(), index));
                    list.clearSelection();
                }
            }
        }

        @Override
        public void valueChanged(ListSelectionEvent event) {
            computeEnabled();
        }

        private void computeEnabled() {
            int index = list.getSelectedIndex();
            addTool.setEnabled(explorer.getSelectedTool() != null);
            moveUp.setEnabled(index > 0);
            moveDown.setEnabled(index >= 0 && index < list.getModel().getSize() - 1);
            remove.setEnabled(index >= 0);
        }

        private void doAddTool(Tool tool) {
            if (tool != null) {
                getProject().doAction(ToolbarActions.addTool(getOptions().getToolbarData(), tool));
            }
        }

        private void doMove(int delta) {
            int oldIndex = list.getSelectedIndex();
            int newIndex = oldIndex + delta;
            ToolbarData data = getOptions().getToolbarData();
            if (oldIndex >= 0 && newIndex >= 0 && newIndex < data.size()) {
                getProject().doAction(ToolbarActions.moveTool(data,
                        oldIndex, newIndex));
                list.setSelectedIndex(newIndex);
            }
        }
    }

    private Listener listener = new Listener();

    private ProjectExplorer explorer;
    private JButton addTool;
    private JButton addSeparator;
    private JButton moveUp;
    private JButton moveDown;
    private JButton remove;
    private ToolbarList list;

    public ToolbarOptions(OptionsFrame window) {
        super(window);
        explorer = new ProjectExplorer(getProject());
        addTool = new JButton();
        addSeparator = new JButton();
        moveUp = new JButton();
        moveDown = new JButton();
        remove = new JButton();

        list = new ToolbarList(getOptions().getToolbarData());

        TableLayout middleLayout = new TableLayout(1);
        JPanel middle = new JPanel(middleLayout);
        middle.add(addTool);
        middle.add(addSeparator);
        middle.add(moveUp);
        middle.add(moveDown);
        middle.add(remove);
        middleLayout.setRowWeight(4, 1.0);

        explorer.setListener(listener);
        addTool.addActionListener(listener);
        addSeparator.addActionListener(listener);
        moveUp.addActionListener(listener);
        moveDown.addActionListener(listener);
        remove.addActionListener(listener);
        list.addListSelectionListener(listener);
        listener.computeEnabled();

        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints gbc = new GridBagConstraints();
        setLayout(gridbag);
        JScrollPane explorerPane = new JScrollPane(explorer,
                ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        JScrollPane listPane = new JScrollPane(list,
                ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        gbc.fill = GridBagConstraints.BOTH;
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gridbag.setConstraints(explorerPane, gbc); add(explorerPane);
        gbc.fill = GridBagConstraints.VERTICAL;
        gbc.anchor = GridBagConstraints.NORTH;
        gbc.weightx = 0.0;
        gridbag.setConstraints(middle, gbc); add(middle);
        gbc.fill = GridBagConstraints.BOTH;
        gbc.weightx = 1.0;
        gridbag.setConstraints(listPane, gbc); add(listPane);
    }

    @Override
    public String getTitle() {
        return getFromLocale("toolbarTitle");
    }

    @Override
    public String getHelpText() {
        return getFromLocale("toolbarHelp");
    }

    @Override
    public void localeChanged() {
        addTool.setText(getFromLocale("toolbarAddTool"));
        addSeparator.setText(getFromLocale("toolbarAddSeparator"));
        moveUp.setText(getFromLocale("toolbarMoveUp"));
        moveDown.setText(getFromLocale("toolbarMoveDown"));
        remove.setText(getFromLocale("toolbarRemove"));
        list.localeChanged();
    }
}
